DIY Video Projector Part II - Page 41

biteon · 23rd July 2002, 06:46 PM

along time ago i had a met down on one of my projector projects. i use the two boards to keep my polvarizer intact with the lcd. now i got a problem with it(see picture below). but i think if i rout a 45 dreg. at the rectangle hole perimeter for the lcd,it might help the problem with the dim edges(just need to barrow a router. see im thinking some of you guys might have the same or simular problem with the housed in lcd setup(that why i kinda wanted to see a cut section drawing).

biteon · 23rd July 2002, 06:49 PM

sorry i forgot the pic, here it is.opps.

ap0the0sis · 23rd July 2002, 07:06 PM

First surface mirror is a mirror that has the reflective coating on the outside of it instead of behind the glass like regular mirrors.

Example: If you were to use a regular piece of mirror to bounce a projector image onto a wall you would get what is called "ghosting" (multiple images, not sharp, color fading etc.)

When you use a first surface mirror it bounces the image exactly as it is projected.

All projectors (every single one as i understand) use first surface mirrors in them to keep focus and contast rations high.

link: http://mirotek.com/images/what%20is%...e%20mirror.pdf

ap0the0sis

biteon · 23rd July 2002, 07:19 PM

i thought the 120v ac neg wire would work for the 12v dc ground .yes im still using the same shoot lcd cause luckly i got it fix enough to work. but i also blew out 3 fans and a computer power supply.note this was like 2 mounths ago on the day i got my lcd in from the ups. crazy

biteon · 23rd July 2002, 07:20 PM

opps i did it again

ap0the0sis · 23rd July 2002, 07:23 PM

biteon,

im surprised that its still working, usually when you over heat an "IC" (the black chip that is shinny now) to the point it shines it usually burns out. looks like lightning hit your lcd module, ha!

ap0the0sis

biteon · 23rd July 2002, 07:30 PM

the light didnt do that cause at the time i didnt have any light source. i was just seeing if it still work when i took it apart with out the original back light hooked up to it. see in ac power the curent moves back and forth, meaning you can get pwr through the neg. wire . yes im a lucky f*ck, cause that chip still works some what and i got a remote to turn on the lcd etc..

biteon · 23rd July 2002, 07:57 PM

undream look at the red,and yellow lines.
every body that thinks a special made reflector can mak all the light go in one direction, look at the blue and yellow lines.
i think you some of you guys forgot about those blue lines.

Undream · 23rd July 2002, 09:04 PM

well, first of all, I threw away that reflector.

And, second of all, I never claimed that it was accurate, or good, or that it would even work at all. I just tried something, because, it seems like nobody ever tries anything, they just sit around and talk here

I'm going to switch over to a longways-mounted bulb (like Marklar's), and stray away from the halogen-worklight styled reflector. I'm going to try to construct a curve as similar as possible to marklar's. However, I already know that I won't be able to make one as good. I've already scavenged the local lighting supplier stores looking for a reflector like the one that Marklar has, with nothing but funny looks and them telling me "That will be $230, want us to special order it for you today?"

Its frustrating as hell.

biteon · 23rd July 2002, 09:39 PM

where can i find a picture of Marklar reflector.i checked this whole thread and didnt find it.

23rd July 2002, 06:46 PM	#401
biteon diyAudio Member Join Date: May 2002	undream etc. along time ago i had a met down on one of my projector projects. i use the two boards to keep my polvarizer intact with the lcd. now i got a problem with it(see picture below). but i think if i rout a 45 dreg. at the rectangle hole perimeter for the lcd,it might help the problem with the dim edges(just need to barrow a router. see im thinking some of you guys might have the same or simular problem with the housed in lcd setup(that why i kinda wanted to see a cut section drawing).

23rd July 2002, 07:06 PM	#403
ap0the0sis diyAudio Member Join Date: Jul 2002 Location: Miami FL	First surface mirror First surface mirror is a mirror that has the reflective coating on the outside of it instead of behind the glass like regular mirrors. Example: If you were to use a regular piece of mirror to bounce a projector image onto a wall you would get what is called "ghosting" (multiple images, not sharp, color fading etc.) When you use a first surface mirror it bounces the image exactly as it is projected. All projectors (every single one as i understand) use first surface mirrors in them to keep focus and contast rations high. link: http://mirotek.com/images/what%20is%...e%20mirror.pdf ap0the0sis

23rd July 2002, 07:19 PM	#404
biteon diyAudio Member Join Date: May 2002	i thought you might find this funny. i thought the 120v ac neg wire would work for the 12v dc ground .yes im still using the same shoot lcd cause luckly i got it fix enough to work. but i also blew out 3 fans and a computer power supply.note this was like 2 mounths ago on the day i got my lcd in from the ups. crazy

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23rd July 2002, 07:23 PM	#406
ap0the0sis diyAudio Member Join Date: Jul 2002 Location: Miami FL	biteon, im surprised that its still working, usually when you over heat an "IC" (the black chip that is shinny now) to the point it shines it usually burns out. looks like lightning hit your lcd module, ha! ap0the0sis

23rd July 2002, 07:30 PM	#407
biteon diyAudio Member Join Date: May 2002	the light didnt do that cause at the time i didnt have any light source. i was just seeing if it still work when i took it apart with out the original back light hooked up to it. see in ac power the curent moves back and forth, meaning you can get pwr through the neg. wire . yes im a lucky f*ck, cause that chip still works some what and i got a remote to turn on the lcd etc..

23rd July 2002, 09:04 PM	#409
Undream diyAudio Member Join Date: Apr 2002 Location: Adrian, MI	well, first of all, I threw away that reflector. And, second of all, I never claimed that it was accurate, or good, or that it would even work at all. I just tried something, because, it seems like nobody ever tries anything, they just sit around and talk here I'm going to switch over to a longways-mounted bulb (like Marklar's), and stray away from the halogen-worklight styled reflector. I'm going to try to construct a curve as similar as possible to marklar's. However, I already know that I won't be able to make one as good. I've already scavenged the local lighting supplier stores looking for a reflector like the one that Marklar has, with nothing but funny looks and them telling me "That will be $230, want us to special order it for you today?" Its frustrating as hell.

23rd July 2002, 09:39 PM	#410
biteon diyAudio Member Join Date: May 2002	where can i find a picture of Marklar reflector.i checked this whole thread and didnt find it.

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